Ontologia

Independent City · USA

Alexandria

United States

CfaTemperate, no dry season, hot summer(100 %)

Species observed

3 399

Observations

471 004

Area

40,6km²

Ecological tissue

Sample of 38 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.

ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Alexandria : 28 espèces reliées par 99 interactions GloBI sur 4 types (connectance 13.4%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
39
Interactions affichées
99
Connectance
0.134
Patrimoniales
0
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Species present

3 399 distinct species · 471 004 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

471 004 obs · 2 cellules
Obs. / cellule
≥ 342 312
342 312–342 311
342 312–342 311
342 312–342 311
< 342 312

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Climate

Mean T°

14,0°C

Annual rain

1 095mm

Warmest m°

31,0°C

Coldest m°

-2,2°C

Elevation: 34 m on average (min -1 m, max 74 m)

Bioclimatic detailsExpert
Annual mean temp.
14,0°C
Annual rain
1 095mm
Warmest month
31,0°C
Coldest month
-2,2°C
Mean alt.
34m
Min
-1m
Max
74m
Std. dev.
22m
Köppen-Geiger (dominant)
CfaTemperate, no dry season, hot summer(100 %)Temperate

CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)

Soil & lithology

pH H₂O

5,1

Org. C

43,4g/kg

Clay

21,4%

Sand

42,2%

Silt

36,4%

Average over 0-30 cm. Per-depth details in expert panel.

Dominant lithology: suGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,1
Org. C
98,0g/kg
Clay
20,2%
Sand
42,8%
Silt
37,0%
5–15 cm
pH H₂O
5,1
Org. C
22,6g/kg
Clay
20,7%
Sand
42,7%
Silt
36,6%
15–30 cm
pH H₂O
5,2
Org. C
9,7g/kg
Clay
23,3%
Sand
41,1%
Silt
35,6%

SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)

Land cover

Forest11.4%
Crops0.3%
Built-up14.7%
Bare soil0.6%
Other (grassland, water…)73.1%

Copernicus Global Land Cover 100m (Buchhorn et al. 2020)

Hydrology1 basins · 0 lakes · 4 rivers

Hydrology metrics for this exact territory

Stream length here

13,7km

Basins crossed

1

Max stream order

2

Max drainage

551km²

Discharge in basins

0,1m³/s

Mean precip.

1 013mm/an

Mean T°

12,9°C

Moisture idx

-0,10

Max snow

2%

Mean runoff

437mm/an

Mean elev. (basins)

66m

Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10

Human pressure

Pop. density

26hab/km²

Night light

45,6nW

Built-up

1 470,8%

Pesticides

0,3kg/km²

GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)

Protected areas1

IUCN V · 1

WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN